21840788352 has 64 divisors (see below), whose sum is σ = 61427235600. Its totient is φ = 6852009984.

The previous prime is 21840788351. The next prime is 21840788353. The reversal of 21840788352 is 25388704812.

It is an interprime number because it is at equal distance from previous prime (21840788351) and next prime (21840788353).

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21840788351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1666327 + ... + 1679382.

Almost surely, 2^21840788352 is an apocalyptic number.

It is an amenable number.

21840788352 is an abundant number, since it is smaller than the sum of its proper divisors (39586447248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21840788352 is a wasteful number, since it uses less digits than its factorization.

21840788352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345743 (or 3345731 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 21840788352 in words is "twenty-one billion, eight hundred forty million, seven hundred eighty-eight thousand, three hundred fifty-two".